Index: trunk/data/validator/combinations.mapcss
===================================================================
--- trunk/data/validator/combinations.mapcss	(revision 9792)
+++ trunk/data/validator/combinations.mapcss	(revision 9794)
@@ -37,5 +37,5 @@
 *[tracks                       ][!railway][route!=railway],
 *[traffic_mode                 ][!railway][route!=railway],
-*[usage                        ][!railway][route!=railway],
+*[usage                        ][!railway][route!=railway][man_made!=pipeline],
 *[workrules                    ][!railway][route!=railway],
 *[stream                       ][!waterway],